Microsoft has released a small but meaningful optional update for Windows 11, and for anyone who’s ever been annoyed by File Explorer showing all file sizes in kilobytes or by a Start menu that forgets your pinned apps, this one’s worth a look. KB5101684, the July 2026 preview cumulative update, lands on Windows 11 versions 24H2 and 25H2 with a focused set of quality-of-life improvements rather than flashy new features. It’s not a security patch—you’ll only get it if you deliberately seek it out—but it tackles exactly the kind of rough edges that make a PC feel sluggish or unpolished.
What Actually Improved in KB5101684
This update pushes Windows 11 24H2 to build 26100.8973 and 25H2 to build 26200.8973. According to Windows Latest, which first detailed the release, several long-standing frustrations get addressed:
File Explorer finally speaks your language
Some of the most visible tweaks happen inside File Explorer. For years, the Details view has stubbornly reported every file size in kilobytes, forcing you to mentally convert “4,194,304 KB” to understand you’re looking at a 4 GB file. Now the Size column uses appropriate units—MB, GB, TB—so that multi-gigabyte ISOs or media files are instantly recognizable. It’s a small change that cuts out a constant, low-grade irritation.
A second addition: middle-click a folder to open it in a new tab. If you’ve ever wished File Explorer tabs worked like your browser, this is for you. It’s a natural shortcut for anyone who routinely juggles multiple directories—copying files between drives, comparing project folders, or checking downloads.
Dark mode users get two cosmetic fixes. The gray flash that could appear when loading the Home page or scrolling has been removed. Thumbnails in the Recommended section are now sharper and easier to identify at a glance. Neither change is monumental, but together they make the dark theme feel less like an afterthought.
Windows Search understands typos and finds settings faster
Search gets a welcome dose of tolerance. Misspell “settings” as “xetting” or “Outlook” as “otlook,” and Windows will still deliver the right result. More important, when you search for a specific Settings page—say, the Bluetooth audio configuration—the system now prioritizes that exact destination instead of showing a grab bag of loosely related options. This alone could save countless minutes spent digging through the sprawling Settings app.
Microsoft is rolling out these search improvements gradually; not every machine will see them immediately after installing KB5101684. That staggered delivery means your mileage may vary, but the underlying logic is now in the operating system.
Start menu, taskbar, and explorer.exe shed their stutter
A bug that caused the Start menu to forget your pinned apps and preferred view has been patched. Low-end PCs that previously suffered stuttering when opening Start should now see much smoother animation. After signing in, the taskbar and Start menu are supposed to be responsive right away—no awkward pause while the shell catches up.
Explorer.exe, the process that powers the desktop, taskbar, and File Explorer, receives several reliability boosts. Switching between virtual desktops and opening Task View uses less memory and lags less. Jump lists and the “recent files” section in File Explorer are less likely to close unexpectedly. For anyone who organizes work into multiple desktops, these improvements mean context switches feel quicker and less disruptive.
Finally, the lock screen no longer penalizes PCs with low system memory. Previously, waking a memory-strapped machine could turn into a sluggish experience; that’s now been tuned.
What This Update Means for You
If you’re a home user who just wants a PC that feels snappy day-to-day, KB5101684 removes small frictions you’ve probably stopped noticing. File sizes that made sense in 1995 finally behave like they do in every other modern interface. A Start menu that keeps your layout means less time rebuilding your workflow. Search that forgives typos is genuinely helpful for anyone who types quickly or struggles with spelling.
Power users get a few specific bonuses. Middle-click tab opening in File Explorer streamlines heavy file management. Better Settings search reduces the number of clicks to reach specific configurations—a timesaver when troubleshooting or tweaking the system. The explorer.exe refinements make virtual desktops more viable as a daily organization tool, especially if you often run memory-intensive apps alongside many windows.
IT administrators and enthusiasts should treat KB5101684 as an early look. Since it’s an optional preview, it’s the perfect candidate for a test ring. Deploy it on a few machines to validate that the fixes help before the changes roll into a mandatory Patch Tuesday update. But don’t confuse “optional” with “unimportant”—these are the exact kinds of improvements that reduce help desk tickets about “my Start menu reset” or “Search doesn’t find anything.”
How We Got Here: Windows 11’s Incremental Polish
Microsoft’s update philosophy has shifted in recent years. Rather than saving all quality fixes for big feature updates, the company now uses optional “D releases”—preview cumulative updates shipped in the fourth week of a month—to deliver targeted improvements to those who want them early. These eventually land in a broader mandatory update the following month.
KB5101684 fits squarely in that pattern. It doesn’t introduce a new app or a redesigned interface. Instead, it patches the kind of paper cuts that add up over hours of daily use: a stuttering Start menu, a File Explorer that feels perpetually stuck in the kilobyte era, a search function that can’t handle a single mistyped letter. The update also reflects a reality Microsoft seems to have grasped: users judge Windows less by marquee features than by whether the desktop shell—explorer.exe—behaves reliably.
Earlier Windows 11 releases laid the groundwork. The 2022 update added tabbed File Explorer but left the interaction model awkward. Virtual desktop support arrived but felt heavy. The Settings app grew deeper while Search lagged in accuracy. KB5101684 is a direct response to those gaps, shaped by telemetry and user feedback collected since then.
What to Do Now: Install or Wait?
How to install KB5101684
Because this is an optional preview, Windows Update won’t automatically download it—unless you’ve turned on “Get the latest updates as soon as they’re available.” To install manually:
- Open Settings > Windows Update.
- Check for updates if necessary.
- Look for “2026-07 Preview Update (KB5101684)” and click Download & install.
- Restart when prompted.
If you need to install offline or on multiple PCs, direct .msu files are available from the Microsoft Update Catalog. However, be aware these packages are large—around 5.4 GB for 25H2 and 4.8 GB for 24H2, per Windows Latest’s reporting—because they are full cumulative packages. Windows Update uses checkpoint differentials to deliver only the missing bits, so the download is typically far smaller. For a single PC, stick with Windows Update.
A note on the “Get the latest updates” toggle: if it’s on, your system may pull down this preview automatically. That’s fine if you want early fixes, but if you prefer to stay on the most conservative servicing track, leave it off.
Who should install now
- Enthusiasts who want the smoothest Windows 11 experience available today.
- Anyone plagued by Start menu resets, File Explorer dark mode flicker, or inaccurate Search results.
- Users with low-memory PCs who see lock-screen lag.
- IT pros evaluating the fixes for a future wider rollout.
Who should wait
- Business-critical machines that are running fine and have no known issues.
- Users who are uncomfortable troubleshooting if something unexpected goes wrong—remember, this is a preview, not a security update.
- Managed enterprise devices that follow formal change-control processes.
Skipping this update doesn’t mean you’ll miss the improvements permanently. Microsoft typically folds these changes into the next Patch Tuesday cumulative update, so they’ll reach all users eventually.
Outlook: What to Watch Next
KB5101684 is a prime example of Windows 11’s new heartbeat: regular, iterative tuning instead of massive semi-annual upheavals. With the base fixes in place, attention will turn to how broadly the Search enhancements roll out over the coming weeks—some users may already see them, while others may need to wait for a subsequent update to trigger the full experience. Microsoft’s gradual rollout model means even after installing, you might not get every advertised improvement right away; patience may be required.
Looking further ahead, expect the upcoming August security update to absorb most of KB5101684’s changes. For those who wait, it’ll be a seamless pickup. For everyone else, this release is a reminder that the most meaningful operating system updates are often the ones you stop noticing because everything just works.